McIntosh has been perfecting vacuum tube amplifiers since the 1940s and solid state amplifiers since the 1960s. Our amplifiers have been used at many historic events including presidential inaugurations and Woodstock, as well as in landmark sound systems like the Grateful Dead's Wall of Sound and Despacio. From that heritage comes a truly one-of-a-kind home audio amplifier only we could dream of, design and build as the ultimate solution for bi-amping loudspeakers: the McIntosh MC901 Dual Mono Amplifier.
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Timonium - 410.308.1650
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Gaithersburg - 301.296.6202
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DESCRIPTION
McIntosh has been perfecting vacuum tube amplifiers since the 1940s and solid state amplifiers since the 1960s. Our amplifiers have been used at many historic events including presidential inaugurations and Woodstock, as well as in landmark sound systems like the Grateful Dead's Wall of Sound and Despacio. From that heritage comes a truly one-of-a-kind home audio amplifier only we could dream of, design and build as the ultimate solution for bi-amping loudspeakers: the McIntosh MC901 Dual Mono Amplifier.
FEATURES
Includes our Hybrid Drive™ technology that uses the best of vacuum tubes and solid state to produce the best sound performance
The ultimate solution for bi-amping loudspeakers: 300 Watt vacuum tube amplifier and 600 Watt solid state amplifier on one chassis
Vacuum tube section powers mid and upper drivers
Solid state section drives power hungry woofers
DualView™ Power Output Meter
Power Guard® that monitors and adjusts the input signal in the 600 Watt solid state amplifier section in real time, then makes unobtrusive adjustments to prevent harsh sounding distortion and potential speaker damaging clipping.
Power Guard Screen Grid Sensor™ (SGS). The 300 Watt vacuum tube amplifier section of the MC901 breaks new ground as it's our first amplifier to feature our new Power Guard SGS™ technology. Power Guard SGS helps prevent premature vacuum tube failure by monitoring the screen grid current in the KT88 output vacuum tubes. If the current becomes too high, a circuit in Power Guard SGS is activated which then dynamically attenuates the input signal in real time to keep the vacuum tubes operating at safe levels.
Sentry Monitor™ observes the output current and shuts the amplifier off if it ever exceeds safe limits.
Quad Balanced design that cancels virtually all noise and distortion that may have crept into the audio signal.
Power Control that can send power on/off signals to other connected McIntosh components for easy system power up and shutdown.
Our patented, gold-plated Solid Cinch™ speaker binding posts that easily and securely attach the speaker cables.
McIntosh Monogrammed Heatsinks™ that are connected to advanced high current output transistors efficiently cool the solid state amplifier section.
Our Power Management System that will turn the entire unit off after a set amount of time when no input signal has been detected.
TECHNICAL SPECS
Power Output per Channel:
Solid State section: 600 Watts @ 2, 4 or 8 Ohms
Vacuum Tube section: 300 Watts @ 2, 4 or 8 Ohms
Number of Channels: 1
Total Harmonic Distortion:
Solid State section: 0.005% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz
Vacuum Tube section: 0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz
Dynamic Headroom: Solid State section: 2.5dB
Vacuum Tube section: 1.2dB
Damping Factor:
Solid State section: >40
Vacuum Tube section: >18
Rated Power Band:
Solid State section: 20Hz to 20kHz
Vacuum Tube section: 20Hz to 20kHz
Frequency Response:
Solid State section:
+0, -0.25dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 100,000Hz
Vacuum Tube section:
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 70,000Hz
Unit Dimensions (W x H x D): 17-17/32" (44.5cm) x 13-3/8" (34cm) x 29-17/32" (75cm)
